Billion BIGUARD 10. Supported network protocols: PPPoE, PPTP, DHCP, NTP, SMTP, SNMP, IGMP, NAT, DMZ. Security algorithms supported: Web. Dimensions (WxDxH): 482 x 166 x 42 mm. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -20 - 70 °C